How do you upload pictures onto fb from a t-mobile phone?

So when I first got the phone it was easy. But then it changed, and I had to sign up for an app that sent me a code. But after uploading two pictures, it wanted me to ‘earn points’ by ‘inviting friends’ or paying for points. what??? my daughter uploaded the photos by opening fb on the phone itself and uploading them. They briefly appeared and then, poof! they were gone? what the hell? Does anybody know anything about how to do this?